1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e31121d09ff87067353eb289115c83c475f09b450bc1d1aba6e3b3ad9228b8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c3ae79a-05bf-40c8-b602-5708ffb3aee4.json and https://artists.proofprofile.net/proofs/artist/6c3ae79a-05bf-40c8-b602-5708ffb3aee4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eafdc7b6a49c9c9263f4335182f3a5d49d77452837dada976ff64b0cabeeb5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1116202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f2204ee97f1ab0c35e1bbb2537b06e5a99c7c0e7375d00540b41c695282d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1067002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d236e7d40cf7a07a4f28289d94c047137a12bfd2592cdc3aa4e0313283be7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1067003.
Crosstown Rebels presents CR20 The Album: Unreleased Gems and Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c5dd6c1177ed849055fd8d9dd67e73d8bd7151bf8b4b7d198554c228951ccd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0682c812ef426f992c299f3021507f9182cd19b977b754733af8260b692caa8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b4c7f8cff9675f1fcc3329a4dde0c3fb050b41a8d90c5ae95bc88694b1eb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a81d2108c6b4c2226ce25a43c9b78b73a583e833afb45aafb629cb031d7132. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99b49d061b5a5e921d90635f9dc17e7b34c2b4e1845b538755d7727377b5c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350ec977aeee10dcc4de318507659e84329c0e49e099aede9882cd43aa7ead7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d10458a7cc1d6b53245add9cd6c02dbc04ed70dd71bd48e631ed386b19cf77. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc805608b54ece81beadb2e2239942d5fcd131b4c127de2d7a53ccd8d58e11afe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1290001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87f9c40e5ee6b2029d5cb56d8eb7c711724c781cf051ed934cee14c4bd13e1d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1292001.
Fables & Fairytales - Deniz Kurtel Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3d29fc40d3ecc2783ed44fac599041a51f8788cb40954f6e7079247ece94f2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU670901576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd326252e1c334fac630d18bb77744e51d0698166aacbc26c66e2cbd206f0f67b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR0902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a81d2108c6b4c2226ce25a43c9b78b73a583e833afb45aafb629cb031d7132. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR2320206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4625c2a5ddd6e09cf7f8180a6a73a27ead83a6c890b61e3563ac072d074e0875. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1116215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c20a0c4cac0195a7a0fb4195022027e3f2c1745446962da385e974011d0e3d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7NR1116217.